WO2012055159A1 - 一种用于伸縮梯的锁定结构 - Google Patents

一种用于伸縮梯的锁定结构 Download PDF

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Publication number
WO2012055159A1
WO2012055159A1 PCT/CN2011/001700 CN2011001700W WO2012055159A1 WO 2012055159 A1 WO2012055159 A1 WO 2012055159A1 CN 2011001700 W CN2011001700 W CN 2011001700W WO 2012055159 A1 WO2012055159 A1 WO 2012055159A1
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WO
WIPO (PCT)
Prior art keywords
connecting sleeve
automatic unlocking
locking structure
unlocking switch
extension ladder
Prior art date
Application number
PCT/CN2011/001700
Other languages
English (en)
French (fr)
Inventor
王万兴
Original Assignee
宁波兴富工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁波兴富工具有限公司 filed Critical 宁波兴富工具有限公司
Priority to EP11835433.1A priority Critical patent/EP2634360A4/en
Publication of WO2012055159A1 publication Critical patent/WO2012055159A1/zh

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/06—Securing devices or hooks for parts of extensible ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
    • E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other

Definitions

  • the present invention relates to an extension ladder having a plurality of ladder bars that are relatively slidable and nested together, and more particularly to a locking structure for an extension ladder. Background technique
  • Ladders are often used when repairs or maintenance tasks occur in homes, apartments, farms, factories, and elsewhere. Ladders must be collected somewhere when not in use. Longer ladders allow people to reach higher altitudes, but they are not easy to carry and take up more space when they are stored. A retractable ladder can extend the ladder during use and fold the ladder when it is stored.
  • U.S. Patent No. 7,040,094 discloses a telescopic ladder that is convenient and safe to use.
  • the ladder includes: a first ladder pole, a second ladder pole, and an extension of the first ladder pole and a plurality of crosspieces between the second ladder bars;
  • the first ladder bar includes a first node bar and a second node bar, the first node bar includes an inner surface, the second node bar passes through the nesting manner and the first node
  • the rods are coupled to a telescopic structure that is movable relative to each other in the longitudinal direction; a locking mechanism selectively locking the second section rod relative to the first section rod; a button operatively coupled to the locking mechanism for manipulating the lock
  • the button is disposed at a position close to the first node bar, and has a concave portion adapted to the size of the thumb of the thumb, and the thumb finger tip is placed in the concave portion to be along the
  • the Chinese utility model patent "Extension ladder” with the patent number ZL200620141000.4 discloses such a telescopic ladder locking structure with a push button.
  • buttons on each rail must be pressed one at a time to fold the ladder, which makes the folding of the ladder time-consuming.
  • the technical problem to be solved by the present invention is to provide an extension ladder capable of unlocking one step at a time and unlocking an adjacent upper lock structure automatically after the lower lock structure is unlocked. Lock structure.
  • a locking structure for an extension ladder including
  • a connecting sleeve for connecting the joint rod and the corresponding crosspiece
  • the connecting sleeve is provided with a latch
  • the latch can be horizontally moved relative to the connecting sleeve and can be exposed to lock the adjacent upper and lower joint rods together
  • the connecting sleeve The utility model is provided with a spring for keeping the latch always exposed, and a push and twist for driving the plug laterally
  • the connecting sleeve is further provided with an automatic unlocking switch connected to the plug, and the telescopic ladder collapses and touches When the lower stage is connected to the sleeve, the automatic unlocking switch is activated and drives the latch to move laterally to unlock.
  • the automatic unlocking switch is rotatably disposed in the connecting sleeve, and the rotation of the automatic unlocking switch can drive the latch to move laterally.
  • the lower end surface of the connecting sleeve has a socket, and the upper end surface of the connecting sleeve has an upwardly protruding pushing portion, and the pushing portion It can be inserted into the jack of the connecting sleeve in the adjacent upper locking structure to push the automatic unlocking switch to rotate.
  • the method of turning and unlocking is more stable.
  • the automatic unlocking switch can also be disposed in the connecting sleeve in a horizontally movable manner, and the automatic unlocking switch of the pushing portion adopts a beveled matching structure, so that the telescopic ladder collapses and touches the lower connecting sleeve.
  • the pusher can push the automatic unlock switch to traverse and unlock.
  • the automatic unlocking switch is L-shaped, and the automatic unlocking switch is composed of a rotating shaft portion, a vertical portion and a horizontal portion.
  • the rotating shaft portion is constrained in the connecting sleeve and can rotate around its own axis, the lower end of the vertical portion and the horizontal portion.
  • the inner end is fixed to the rotating shaft portion, the upper end of the vertical portion is connected to the plug pin, the outer end of the horizontal portion extends to the position of the jack, and the pushing portion is inserted into the jack of the connecting sleeve of the adjacent upper locking structure The outer end of the horizontal portion is pushed rearward to rotate the automatic unlocking switch.
  • the automatic unlocking switch is set to an L shape, and the structure is the simplest under the premise that the automatic unlocking switch can be driven by the pushing portion to finally drive the latch to move.
  • the automatic unlocking switch can also be designed into other shapes, as long as the rotation of the automatic unlocking switch can be driven to drive the latch to move laterally.
  • the vertical portion of the automatic unlocking switch has two parallel spacings, the lower end of the vertical portion is connected to the middle portion of the rotating shaft portion, the middle portion of the latch has a first annular groove, and the upper end card of the vertical portion of the automatic unlocking switch
  • the first annular groove is in contact with the end surface of the first annular groove;
  • the horizontal portion of the automatic unlocking switch is disposed at two parallel intervals, and the inner ends of the horizontal portion are respectively connected with the two ends of the rotating shaft portion, and the connecting sleeve is There are also two jacks.
  • the automatic unlocking switch realizes the connection between the automatic unlocking switch and the latch through the vertical portion of the upper locking slot, so the assembly is also convenient, and the two horizontal portions are provided to ensure that the pushing portion can more smoothly push the automatic unlocking switch.
  • the two horizontal portions are provided to ensure that the pushing portion can more smoothly push the automatic unlocking switch.
  • the structure of the automatic unlocking switch is too thin to rotate smoothly.
  • the upper end of the vertical portion of the above automatic unlocking switch has an arc shape.
  • the end portions of the vertical portion and the first annular groove are in a curved surface contact, so that the lateral slip of the pin can be easily pushed when the automatic unlocking switch is rotated.
  • the horizontal end of the above-mentioned automatic unlocking switch has two bumps extending downward and inserted into the corresponding jacks. This makes it easier to connect the pusher on the sleeve to the temperature of the automatic unlocking switch, and to make the automatic unlocking switch rotate more in the same range of movement.
  • the inner side of the connecting sleeve has an insertion portion that is inserted into the crosspiece, the insertion portion has a cavity therein, the latch, the automatic unlocking switch and the spring are located in the cavity;
  • the outer side of the connecting sleeve has an annular surface, and the annular surface forms a joint rod
  • the sleeve is sleeved, and the socket wall has a through hole penetrating the cavity for the pin to pass through. It is a conventional structure of the connecting sleeve, It is convenient to connect the crosspiece and the strut to the connecting sleeve.
  • a spring seat is fixed in the cavity of the insertion portion, and the spring seat has a receiving hole.
  • the rear portion of the pin is located at the front portion of the receiving hole, and the spring is located in the receiving hole.
  • one end of the spring abuts against the rear of the pin, and the other end of the spring abuts against the rear inner wall of the receiving hole.
  • the spring seat has two sides on both sides, and correspondingly, the inner side of the cavity is provided with a slot for inserting the edge.
  • the spring seat can be easily positioned in the cavity by the action of the hem and the slot.
  • a front end surface of the insertion portion of the connecting sleeve is provided with a strip-shaped hole disposed laterally and communicating with the concave cavity, and the middle portion of the plug has a second annular groove, and the push twist is located outside the front end surface of the insertion portion, after the twisting
  • the end surface has a connecting portion extending rearward, and the connecting portion passes through the strip hole and is buckled in the second annular groove and contacts the end surface of the second annular groove.
  • the push twist is connected to the plug through the connection manner of the buckle, and has the advantage of convenient installation.
  • the advantages of the present invention are as follows: When a single section is required to be unlocked step by step, the upper locking structure of the extension ladder is required to be unlocked to the lower level step by step, and only the push and twist are pushed when unlocking, and the push pin is driven laterally toward the drive.
  • the inner movement can unlock the locking of the upper and lower joints of the extension ladder; when the lower locking structure is unlocked, the adjacent upper locking structure and the crosspiece are moved downward by the weight until the lower locking structure
  • the pushing portion of the connecting sleeve is inserted into the jack of the connecting sleeve in the adjacent upper locking structure to push the automatic unlocking switch to rotate, and finally the driving pin is moved laterally inward to release the locking structure of the stage, and so on, which can automatically release the superior level step by step.
  • the locking structure therefore, the locking structure has the characteristics of a variety of unlocking modes, so the operation is more convenient.
  • FIG. 2 is a perspective view of a three-dimensional assembly of a push-twist and an automatic unlocking switch and a latch (locked state);
  • FIG. 3 is an exploded perspective view of an embodiment of the present invention.
  • Figure 4 is a cross-sectional view (locked state) of use of the extension ladder in accordance with an embodiment of the present invention
  • Figure 5 is a schematic perspective view of an embodiment of the present invention (unlocked state);
  • FIG. 6 is a schematic perspective view of an embodiment of the present invention (unlocked state);
  • FIG. 7 is a perspective view of a three-dimensional assembly (unlocked state) of a push-twist and an automatic unlocking switch and a latch according to an embodiment of the present invention
  • FIG. 8 is a cross-sectional view (unlocked state) used on an extension ladder according to an embodiment of the present invention
  • Figure 9 is a perspective view (unlocked state) used on an extension ladder according to an embodiment of the present invention. detailed description
  • a locking structure for an extension ladder comprising a connection sleeve 3 for connecting the node rod 1 and the corresponding rail 2;
  • the inner side of the connecting sleeve 3 has an insertion portion 33 that is inserted into the crosspiece 2, and the insertion portion 33 has a concave cavity 331.
  • the lower end of the concave cavity 331 is open to facilitate mounting the components into the cavity 331 and inserting the insertion portion.
  • the connecting sleeve 3 has an annular surface, and the annular surface forms a socket 34 that is sleeved with the node rod 1,
  • the sleeve 34 is tightly fitted to the outer periphery of the upper portion of the joint rod 1, and the sleeve 34 can be fixed to the joint rod 1 by screws.
  • the inner cavity 331 of the connecting sleeve 3 is provided with a pin 4, and the middle of the pin 4 has a first annular groove 41, which can be horizontally moved laterally relative to the connecting sleeve 3 and can be exposed to lock the adjacent upper and lower joints 1 Together, the connecting sleeve 3 is provided with a spring 5 for keeping the latch 4 always exposed.
  • the socket 34 has a through hole 341 extending through the cavity 331 for the plug 4 to pass through, and a section fixed to the connecting sleeve 3
  • a locking hole 11 is defined in the wall of the rod 1 , and a locking hole 12 is also disposed in the middle of the upper section of the rod 1 .
  • the spring 5 is mounted in the cavity 331 by the following structure.
  • a spring seat 8 is further fixed in the cavity 331.
  • the spring seat 8 has a receiving hole 81.
  • the rear part of the pin 4 is located at the front part of the receiving hole 81.
  • the spring 5 is located at the rear of the accommodating hole 81.
  • One end of the spring 5 abuts against the rear portion of the pin 4, and the other end of the spring 5 abuts against the rear inner wall of the accommodating hole 81; the spring seat 8 has hem at both sides 82.
  • the inner side of the cavity 331 is provided with a slot 332 for inserting the insertion edge 82.
  • a pusher 6 for driving the latch 4 to move laterally the pusher 6 is located outside the front end face of the insertion portion 33, and the rear end face of the pusher 6 has a connecting portion 61 extending rearward, and the front end surface of the insertion portion 33 of the connecting sleeve is opened There is a strip-shaped hole 333 which is disposed laterally and communicates with the cavity 3.
  • the side wall of the crosspiece 2 is also provided with a strip shape corresponding to the aforementioned strip-shaped hole 333.
  • the hole has a second annular groove 42 in the middle of the pin 4, and the connecting portion 61 of the push pin 6 sequentially passes through the strip hole on the crosspiece 2 and the strip hole 333 on the insertion portion, and then snaps into the second annular groove 42 And contacting the end surface of the second annular groove 42.
  • An automatic unlocking switch 7 connected to the latch 4 is further disposed in the cavity 331 of the connecting sleeve 3.
  • the automatic unlocking switch 7 is L-shaped, and the automatic unlocking switch 7 is composed of a rotating shaft portion 71, a vertical portion 72 and a horizontal portion 73.
  • the automatic unlocking switch 7 in this embodiment is an integrally formed piece.
  • the automatic unlocking switch 7 is rotatably disposed in the connecting sleeve 3 through the rotating shaft portion 71.
  • the rotating shaft portion 71 is restrained in the connecting sleeve 3 and can rotate around its own axis.
  • the rotation of the automatic unlocking switch 7 can drive the latch 4 to move laterally;
  • the straight portion 72 is disposed in two parallel intervals, and the lower end of the vertical portion 72 is coupled to the central portion of the rotating shaft portion 71.
  • the upper end of the vertical portion 72 of the automatic unlocking switch is caught in the first annular groove 41 and intersects with the first annular groove 41.
  • the end face is touched, and the upper end of the vertical portion 72 has an arc shape; the horizontal portion 73 of the automatic unlocking switch has two parallel and spaced intervals, and the inner ends of the horizontal portion 72 are respectively connected with the two ends of the rotating shaft portion 71, and the connecting sleeve
  • the lower end surface of the 3 has two insertion holes 31, the outer end of the horizontal portion 73 extends to the position of the insertion hole 31, and the outer end of the horizontal portion 73 has two protrusions 731 extending downwardly and inserted into the corresponding insertion holes 31.
  • the upper end surface of the connecting sleeve 3 has two upwardly projecting pushing portions 32. After the pushing portion 32 is inserted into the insertion hole 31 of the connecting sleeve in the adjacent upper locking structure, the outer end of the horizontal portion 73 is pushed to rotate the automatic unlocking switch 7. .
  • the working principle and process of the locking structure are as follows:
  • the upper-level locking structure is automatically released step by step.
  • the adjacent upper-level locking structure and the crosspiece 2 are moved downward by the self-weight until the lower-level locking.
  • the pushing portion 32 of the connecting sleeve in the structure is inserted into the insertion hole 31 of the connecting sleeve in the adjacent upper locking structure to push the convex portion 731 of the horizontal portion 73, and the automatic unlocking switch 7 is rotated, and finally the driving pin 4 is moved laterally inward to release the The stage locking structure, and so on, can release the superior locking structure step by step.

Description

一种用于伸缩梯的锁定结构 技术领域
本发明涉及一种具有若干可相对滑动并且相互嵌套在一起的梯杆的伸缩梯，特别涉 及一种用于伸缩梯的锁定结构。 背景技术
在住宅、公寓、农场、工厂和其他地方发生维修或维护任务时， 经常需要使用梯子。 梯子在不使用的时候必须在某个地方被收藏起来。较长的梯子能够让人们到达更高的高 度， 但是却不便于搬运并且在收藏的时候会占用更多的空间。 而可伸缩的梯子就能够在 使用时将梯子伸长， 而在收藏时将梯子折叠起来。
目前关于伸缩梯的专利文献有很多，有一号为 US7048094的美国专利公开了一种这 样使用方便安全的伸缩梯， 该梯子包括： 第一梯杆， 第二梯杆以及延伸在第一梯杆和第 二梯杆之间的若干横档； 第一梯杆包括有第一节杆和第二节杆， 该第一节杆包括有一内 表面， 第二节杆通过嵌套的方式和第一节杆连接成一可沿长度方向相对运动的伸缩结 构； 一锁定机构， 可选择地将第二节杆相对第一节杆锁紧； 一按钮， 可操作地连接在锁 定机构上， 用于操控该锁定机构； 本专利的特征在于， 所述的按钮设置在靠近第一节杆 的位置， 并具有一个可与拇指指尖大小相适配的凹部， 拇指指尖放在该凹部内可沿着从 第一节杆往第二节杆的方向推动按钮而取消锁定机构对第二节杆的锁紧； 一套管， 套设 在第二节杆的外表面上； 该套管具有和第一节杆的内表面相接触的外导向面。 前述伸缩 梯具有一带推钮的锁定机构。
如一专利号为 ZL200620141000.4(公告号为 CN200985735Y)的中国实用新型专利 《伸缩梯》 披露了这样一种带推钮的伸缩梯锁定结构。
前述各种伸缩梯的缺点是必须一次一个地按下每个横档上的按钮才能将梯子折叠 起来， 这就使得这种梯子折叠起来费时。 发明内容
本发明所要解决的技术问题是针对上述现有技术现状而提供一种既可单节逐级解 锁、又可实现当下级锁定结构解锁后能将相邻的上级锁定结构自动解锁的用于伸缩梯的 锁定结构。
本发明解决上述技术问题所采用的技术方案为：一种用于伸缩梯的锁定结构，包括
- 1 - 确认本 用于连接节杆和相应横档的连接套， 连接套内设有插销， 该插销能相对连接套水平横向 移动并能露出而将相邻的上下两节节杆锁定在一起，所述连接套内设有使插销始终保持 外露趋势的弹簧， 及驱动插销横向移动的推扭， 其特征在于： 所述连接套内还设有与插 销相连的自动解锁开关， 在伸缩梯塌缩并触抵到下级连接套时， 所述自动解锁开关被触 动并带动插销横向移动而解锁。
上述自动解锁开关转动设置在连接套内， 自动解锁开关的转动能带动插销横向移 动， 所述连接套的下端面开有插孔， 连接套的上端面具有向上凸起的推动部， 该推动部 能插入相邻的上级锁定结构中连接套的插孔内而推动自动解锁开关转动。转动解锁的方 式更为平稳， 当然自动解锁开关也可以采用能水平移动的方式设置在连接套内， 推动部 自动解锁开关采用斜面配合结构， 而使在伸缩梯塌缩并触抵到下级连接套时， 推动部能 推动自动解锁开关横移而解锁。
上述自动解锁开关呈 L形， 自动解锁开关由转轴部、 竖直部和水平部三部分组成， 所述转轴部约束在连接套内并能绕自身轴线旋转，竖直部的下端和水平部的内端均与转 轴部固定， 竖直部的上端与所述插销相连， 水平部的外端延伸至所述插孔位置处， 所述 推动部插入相邻的上级锁定结构中连接套的插孔后推动水平部的外端而使自动解锁开 关转动。将自动解锁开关设置成 L形在满足自动解锁开关能被推动部带动转动最终带动 插销移动的前提下， 其结构最为简单。 当然自动解锁开关也可设计成其它外形， 只要能 满足自动解锁开关的转动能带动插销横向移动即可。
上述自动解锁开关的竖直部有两个且平行间隔设置，竖直部的下端与转轴部的中部 连接， 所述插销中部具有第一环形槽， 所述自动解锁开关的竖直部的上端卡在第一环形 槽内并与第一环形槽的端面触碰； 所述自动解锁开关的水平部有两个且平行间隔设置， 水平部的内端分别与转轴部的两端连接， 连接套的插孔也有两个。 而且自动解锁开关通 过其上的竖直部卡在第一环形槽内而实现自动解锁开关与插销的连接， 故组装也很方 便， 设置两个水平部能保证推动部能更平稳推动自动解锁开关转动。 当然竖直部和水平 部也可只有一个， 只需在插销上开一轴向设置的条形通孔， 将竖直部插入条形通孔内， 其对各部件之间的装配要求较高，而且这种自动解锁开关结构过于单薄，不能平稳转动。
上述自动解锁开关的竖直部的上端呈圆弧状。竖直部和第一环形槽的端面为弧面接 触， 这样当自动解锁开关转动时能轻松推动插销横向滑移。
上述自动解锁开关的水平部外端具有两向下延伸并插入相应插孔的凸点。这样能更 好连接套上的推动部与自动解锁开关温度接触， 而且在相同的移动范围内使自动解锁开 关转动角度更大。
上述连接套的内侧具有与横档插接的插入部， 插入部内具有凹腔， 所述插销、 自动 解锁开关和弹簧位于该凹腔内； 连接套外侧具有环形表面， 该环形表面形成与节杆套接 的套接口，套接口壁上具有与凹腔相贯通以供插销穿过的通孔。其为连接套的常规结构， 能方便将横档及节杆连接到该连接套上。
为便于安置弹簧， 上述插入部的凹腔内固定有一弹簧座， 弹簧座上具有容置孔， 所 述插销的后部则位于容置孔内的前部， 所述弹簧位于容置孔内的后部， 弹簧的一端抵靠 在插销的后部， 弹簧的另一端抵靠在容置孔的后内壁上。
上述弹簧座两侧具有插边， 对应， 凹腔内两侧设有供插边插设的插槽。 通过插边和 插槽的作用， 能方便将弹簧座限位在凹腔内。
上述连接套的插入部的前端面上开有横向设置并与所述凹腔相通的条形孔，插销中 部具有第二环形槽， 所述推扭位于插入部的前端面外， 推扭的后端面上具有向后延伸的 连接部， 该连接部穿过条形孔后卡扣在所述第二环形槽内并与第二环形槽的端面触碰。 该推扭通过卡扣的连接方式与插销连接， 具有安装方便的优点。
与现有技术相比， 本发明的优点在于： 当需要单节逐级解锁， 则需从伸缩梯的上级 锁定结构逐级往下级解锁， 解锁时只需推动推扭， 推扭带动插销横向朝内移动便能解除 伸缩梯相邻上下两节节杆的锁定； 当先将下级锁定结构解锁后， 其相邻的上级锁定结构 连同横档在自重的作用下往下移，直至下级锁定结构中的连接套的推动部插入相邻的上 级锁定结构中连接套的插孔内而推动自动解锁开关转动，最终带动插销横向朝内移动解 除该级锁定结构， 以此类推， 其能逐级自动解除上级锁定结构； 因此本锁定结构具有解 锁方式多样性的特点， 因此操作更加方便。 附图说明
图 1为本发明实施例的立体结构示意图 (锁定状态)；
图 2为本发明实施例中推扭和自动解锁开关与插销的立体装配示意图 (锁定状态)； 图 3为本发明实施例的立体分解图；
图 4为本发明实施例在伸缩梯上的使用的剖视图 (锁定状态)；
图 5为本发明实施例的立体结构示意图一 (解锁状态)；
图 6为本发明实施例的立体结构示意图二 （解锁状态)；
图 7为本发明实施例中推扭和自动解锁开关与插销的立体装配示意图 (解锁状态)； 图 8为本发明实施例在伸缩梯上使用的剖视图 (解锁状态)；
图 9为本发明实施例在伸缩梯上使用的立体示意图 (解锁状态)。 具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
如图 1〜9所示， 为本发明的一个优选实施例。
一种用于伸缩梯的锁定结构， 包括用于连接节杆 1和相应横档 2的连接套 3 ; 其中， 连接套 3的内侧具有与横档 2插接的插入部 33 , 插入部 33内具有凹腔 331， 该凹腔 331的下端开口， 便于将各部件安装到凹腔 331内， 将插入部 33插入横档 2并 与横档 2固定， 横档 2的下端面将凹腔 331的下端开口遮蔽； 连接套 3外侧具有环形表 面， 该环形表面形成与节杆 1套接的套接口 34， 该套接口 34与节杆 1上部外周紧配， 并可通过螺钉将套接口 34与节杆 1固定。
连接套 3的内凹腔 331设有插销 4， 插销 4中部具有第一环形槽 41， 该插销 4能相 对连接套 3水平横向移动并能露出而将相邻的上下两节节杆 1锁定在一起，连接套 3内 设有使插销 4始终保持外露趋势的弹簧 5，套接口 34壁上具有与凹腔 331相贯通以供插 销 4穿过的通孔 341， 与连接套 3相固定的节杆 1壁上开有锁孔 11， 插设在前述节杆 1 的上一节节杆 1 中部也设有一锁孔 12， 当插销 4穿出连接套 3后依次进入两个节杆 1 的锁孔 11、 12中， 将该两节节杆 1锁定。 其为现有伸缩梯的锁定结构的常规设计。
弹簧 5通过以下结构安装在凹腔 331内， 在凹腔 331内还固定有一弹簧座 8， 弹簧 座 8上具有容置孔 81， 插销 4的后部则位于容置孔 81内的前部， 弹簧 5位于容置孔 81 内的后部， 弹簧 5的一端抵靠在插销 4的后部， 弹簧 5的另一端抵靠在容置孔 81的后 内壁上； 弹簧座 8两侧具有插边 82， 对应， 凹腔 331内两侧设有供插边 82插设的插槽 332。
一驱动插销 4横向移动的推扭 6，推扭 6位于插入部 33的前端面外，推扭 6的后端 面上具有向后延伸的连接部 61， 连接套的插入部 33的前端面上开有横向设置并与凹腔 3相通的条形孔 333， 当然， 由于插入部 33插设在横档 2内， 因此横档 2的侧壁上也开 有与前述条形孔 333相应的条形孔，在插销 4中部具有第二环形槽 42，推扭 6的连接部 61依次穿过横档 2上的条形孔及插入部上的条形孔 333后卡扣在第二环形槽 42内并与 第二环形槽 42的端面触碰。
连接套 3的凹腔 331内还设有与插销 4相连的自动解锁开关 7， 自动解锁开关 7呈 L形， 自动解锁开关 7由转轴部 71、 竖直部 72和水平部 73三部分组成， 本实施例中的 自动解锁开关 7为一体成型件。 自动解锁开关 7通过转轴部 71转动设置在连接套 3内， 转轴部 71约束在连接套 3内并能绕自身轴线旋转，自动解锁开关 7的转动能带动插销 4 横向移动； 自动解锁开关的竖直部 72有两个且平行间隔设置， 竖直部 72的下端与转轴 部 71的中部连接， 自动解锁开关的竖直部 72的上端卡在第一环形槽 41 内并与第一环 形槽 41的端面触碰， 且竖直部 72的上端呈圆弧状； 自动解锁开关的水平部 73有两个 且平行间隔设置， 水平部 72的内端分别与转轴部 71的两端连接， 连接套 3的下端面开 有两个插孔 31， 水平部 73的外端延伸至插孔 31位置处， 且水平部 73外端具有两向下 延伸并插入相应插孔 31的凸点 731。
连接套 3的上端面具有两个向上凸起的推动部 32， 在推动部 32插入相邻的上级锁 定结构中连接套的插孔 31后推动水平部 73的外端而使自动解锁开关 7转动。 本锁定结构的工作原理及过程如下：
如图 1〜4所示， 锁定时， 上一节节杆 1上移， 当移动到合适位置， 即相邻两节节 杆 1上锁定孔 11、 12位于同一轴线上， 插销 4在弹簧 5的作用下弹出， 同时插入该两 节节杆 1的锁孔 11、 12内， 将该两节节杆 1锁定在一起。
如图 5〜9所示， 当需要单节逐级解锁， 则需从伸缩梯的上级锁定结构逐级往下级 解锁， 解锁时只需推动推扭 6， 推扭 6带动插销 4克服弹簧 5的弹力横向朝内移动， 插 销 4退出两节节杆 1的锁孔 11、 12, 解除伸缩梯相邻上下两节节杆 1的锁定， 上一节节 杆 1在重力的作用下下移。
如图 5〜9所示， 逐级自动解除上级锁定结构， 先推动对牛将下级锁定结构解锁后， 其相邻的上级锁定结构连同横档 2在自重的作用下往下移，直至下级锁定结构中的连接 套的推动部 32插入相邻的上级锁定结构中连接套的插孔 31 内而推动水平部 73的凸点 731 , 自动解锁开关 7转动， 最终带动插销 4横向朝内移动解除该级锁定结构， 以此类 推， 其能逐级解除上级锁定结构。

Claims

权 利 要 求
1、 一种用于伸缩梯的锁定结构， 包括用于连接节杆 (1)和相应横档 (2)的连接套 (3)， 连接套 (3)内设有插销 (4)， 该插销 (4)能相对连接套 (3)水平横向移动并能露出而将相邻的 上下两节节杆 (1)锁定在一起， 所述连接套 (3)内设有使插销 (4)始终保持外露趋势的弹簧 (5), 及驱动插销 (4)横向移动的推扭 (6)， 其特征在于： 所述连接套 (3)内还设有与插销 (4) 相连的自动解锁开关 (7)，在伸缩梯塌缩并触抵到下级连接套 (3)时，所述自动解锁开关 (7) 被触动并带动插销 (4)横向移动而解锁。
2、 根据权利要求 1所述的用于伸缩梯的锁定结构， 其特征在于： 所述自动解锁开 关 (7)转动设置在连接套 (3)内， 自动解锁开关 (7)的转动能带动插销 (4)横向移动， 所述连 接套 (3)的下端面开有插孔 (31)， 连接套 (3)的上端面具有向上凸起的推动部 (32)， 该推动 部 (32)能插入相邻的上级锁定结构中连接套的插孔 (31)内而推动自动解锁开关 (7)转动。
3、 根据权利要求 2所述的用于伸縮梯的锁定结构， 其特征在于： 所述自动解锁开 关 (7)呈 L形， 自动解锁开关 (7)由转轴部 (71)、 竖直部 (72)和水平部 (73)三部分组成， 所 述转轴部 (71)约束在连接套 (3)内并能绕自身轴线旋转， 竖直部 (72)的下端和水平部 (73) 的内端均与转轴部 (71)固定， 竖直部 (72)的上端与所述插销 (4)相连， 水平部 (73)的外端延 伸至所述插孔 (31)位置处，所述推动部 (32)插入相邻的上级锁定结构中连接套的插孔 (31) 后推动水平部 (73)的外端而使自动解锁开关 (7)转动。 '
4、 根据权利要求 3所述的用于伸缩梯的锁定结构， 其特征在于： 所述自动解锁开 关的竖直部 (72)有两个且平行间隔设置， 竖直部 (72)的下端与转轴部 (71)的中部连接， 所 述插销 (4)中部具有第一环形槽 (41)， 所述自动解锁开关的竖直部 (72)的上端卡在第一环 形槽 (41)内并与第一环形槽 (41)的端面触碰； 所述自动解锁开关的水平部 (73)有两个且平 行间隔设置， 水平部 (72)的内端分别与转轴部 (71)的两端连接， 所述连接套的插孔 (31) 有两个。
5、 根据权利要求 4所述的用于伸缩梯的锁定结构， 其特征在于： 所述自动解锁开 关的竖直部 (72)的上端呈圆弧状。
6、 根据权利要求 4所述的用于伸缩梯的锁定结构， 其特征在于： 所述自动解锁开 关的水平部 (73)外端具有两向下延伸并插入相应插孔 (31)的凸点 (731)。
7、根据权利要求 1〜6中任一权利要求所述的用于伸缩梯的锁定结构，其特征在于： 所述连接套 (3)的内侧具有与横档 (2)插接的插入部 (33)， 插入部 (33)内具有凹腔 (331)， 所 述插销 (4)、 自动解锁开关 (7)和弹簧 (5)位于该凹腔 (331)内；连接套 (3)外侧具有环形表面， 该环形表面形成与节杆 (1)套接的套接口 (34)， 套接口 (34)壁上具有与凹腔 (331)相贯通以 供插销 (4)穿过的通孔 (341)。
8、 根据权利要求 7所述的用于伸缩梯的锁定结构， 其特征在于： 所述插入部的凹 腔 (331)内还固定有一弹簧座 (8)， 弹簧座 (8)上具有容置孔 (81), 所述插销 (4)的后部则位 于容置孔 (81)内的前部， 所述弹簧 (5)位于容置孔 (81)内的后部， 弹簧 (5)的一端抵靠在插 销 (4)的后部， 弹簧 (5)的另一端抵靠在容置孔 (81)的后内壁上。
9、 根据权利要求 8所述的用于伸缩梯的锁定结构， 其特征在于： 所述弹簧座 (8)两 侧具有插边 (82)， 对应， 凹腔 (331)内两侧设有供插边插设的插槽 (332)。
10、根据权利要求 7所述的用于伸缩梯的锁定结构， 其特征在于： 所述连接套的插 入部 (33)的前端面上开有横向设置并与所述凹腔 (3)相通的条形孔 (333)，插销 (4)中部具有 第二环形槽 (42)， 所述推扭 (6)位于插入部 (33)的前端面外， 推扭 (6)的后端面上具有向后 延伸的连接部 (61)，该连接部 (61)穿过条形孔 (333)后卡扣在所述第二环形槽 (42)内并与第 二环形槽 (42)的端面触碰。
PCT/CN2011/001700 2010-10-28 2011-10-11 一种用于伸縮梯的锁定结构 WO2012055159A1 (zh)

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